Corrected entry: In the street, Cassandra tries to catch some water in a rusty bottle on the pavement. After this you see a new can (blue-green-yellow with "N" sign on it) and then a rusty bottle again.

Correction:Cassandra is so dehydrated and desperate for something to drink that she momentarily imagines the empty can being a soda can, but it becomes the can after she realises that there's nothing in it.